[PATCH v2 1/7] thermal: of: Use scoped device node handling to simplify of_find_trip_id()

[Krzysztof Kozlowski]

Obtain the device node reference with scoped/cleanup.h and use scoped
for_each_child_of_node_scoped() to reduce error handling in
of_find_trip_id() and make the code a bit simpler.

Reviewed-by: Chen-Yu Tsai <wenst at chromium.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski at linaro.org>
---
 drivers/thermal/thermal_of.c | 20 ++++++--------------
 1 file changed, 6 insertions(+), 14 deletions(-)

diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c
index 1f252692815a..a2278d4ad886 100644
--- a/drivers/thermal/thermal_of.c
+++ b/drivers/thermal/thermal_of.c
@@ -8,6 +8,7 @@
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
+#include <linux/cleanup.h>
 #include <linux/err.h>
 #include <linux/export.h>
 #include <linux/of.h>
@@ -22,11 +23,9 @@
 
 static int of_find_trip_id(struct device_node *np, struct device_node *trip)
 {
-	struct device_node *trips;
-	struct device_node *t;
 	int i = 0;
 
-	trips = of_get_child_by_name(np, "trips");
+	struct device_node *trips __free(device_node) = of_get_child_by_name(np, "trips");
 	if (!trips) {
 		pr_err("Failed to find 'trips' node\n");
 		return -EINVAL;
@@ -35,20 +34,13 @@ static int of_find_trip_id(struct device_node *np, struct device_node *trip)
 	/*
 	 * Find the trip id point associated with the cooling device map
 	 */
-	for_each_child_of_node(trips, t) {
-
-		if (t == trip) {
-			of_node_put(t);
-			goto out;
-		}
+	for_each_child_of_node_scoped(trips, t) {
+		if (t == trip)
+			return i;
 		i++;
 	}
 
-	i = -ENXIO;
-out:
-	of_node_put(trips);
-
-	return i;
+	return -ENXIO;
 }
 
 /*

-- 
2.43.0